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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/core/loader/modulescript/module_script_fetcher.h"
#include "third_party/blink/renderer/core/inspector/console_message.h"
#include "third_party/blink/renderer/core/loader/subresource_integrity_helper.h"
#include "third_party/blink/renderer/platform/loader/cors/cors.h"
#include "third_party/blink/renderer/platform/network/mime/mime_type_registry.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
namespace blink {
void ModuleScriptFetcher::Client::OnFetched(
const base::Optional<ModuleScriptCreationParams>& params) {
NotifyFetchFinished(params, HeapVector<Member<ConsoleMessage>>());
}
void ModuleScriptFetcher::Client::OnFailed() {
NotifyFetchFinished(base::nullopt, HeapVector<Member<ConsoleMessage>>());
}
bool ModuleScriptFetcher::WasModuleLoadSuccessful(
Resource* resource,
HeapVector<Member<ConsoleMessage>>* error_messages) {
// Implements conditions in Step 7 of
// https://html.spec.whatwg.org/#fetch-a-single-module-script
DCHECK(error_messages);
if (resource) {
SubresourceIntegrityHelper::GetConsoleMessages(
resource->IntegrityReportInfo(), error_messages);
}
// - response's type is "error"
if (!resource || resource->ErrorOccurred() ||
resource->IntegrityDisposition() !=
ResourceIntegrityDisposition::kPassed) {
return false;
}
const auto& response = resource->GetResponse();
// - response's status is not an ok status
if (response.IsHTTP() && !cors::IsOkStatus(response.HttpStatusCode())) {
return false;
}
// The result of extracting a MIME type from response's header list
// (ignoring parameters) is not a JavaScript MIME type
// Note: For historical reasons, fetching a classic script does not include
// MIME type checking. In contrast, module scripts will fail to load if they
// are not of a correct MIME type.
// We use ResourceResponse::HttpContentType() instead of MimeType(), as
// MimeType() may be rewritten by mime sniffer.
if (!MIMETypeRegistry::IsSupportedJavaScriptMIMEType(
response.HttpContentType())) {
String message =
"Failed to load module script: The server responded with a "
"non-JavaScript MIME type of \"" +
response.HttpContentType() +
"\". Strict MIME type checking is enforced for module scripts per "
"HTML spec.";
error_messages->push_back(ConsoleMessage::CreateForRequest(
kJSMessageSource, kErrorMessageLevel, message,
response.CurrentRequestUrl().GetString(), nullptr,
resource->Identifier()));
return false;
}
return true;
}
} // namespace blink
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